examples/eventdev: add single stage pipeline worker

Add optimized eventdev pipeline when ethdev supports thread safe Tx
and number of configured stages is one.

Signed-off-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
Acked-by: Harry van Haaren <harry.van.haaren@intel.com>

diff --git a/examples/eventdev_pipeline_sw_pmd/pipeline_worker_tx.c b/examples/eventdev_pipeline_sw_pmd/pipeline_worker_tx.c
index 25eabbd..21985b0 100644 (file)
--- a/examples/eventdev_pipeline_sw_pmd/pipeline_worker_tx.c
+++ b/examples/eventdev_pipeline_sw_pmd/pipeline_worker_tx.c
@@ -43,6 +43,90 @@ worker_tx_pkt(struct rte_mbuf *mbuf)
                rte_pause();
 }
 
+/* Single stage pipeline workers */
+
+static int
+worker_do_tx_single(void *arg)
+{
+       struct worker_data *data = (struct worker_data *)arg;
+       const uint8_t dev = data->dev_id;
+       const uint8_t port = data->port_id;
+       size_t fwd = 0, received = 0, tx = 0;
+       struct rte_event ev;
+
+       while (!fdata->done) {
+
+               if (!rte_event_dequeue_burst(dev, port, &ev, 1, 0)) {
+                       rte_pause();
+                       continue;
+               }
+
+               received++;
+
+               if (ev.sched_type == RTE_SCHED_TYPE_ATOMIC) {
+                       worker_tx_pkt(ev.mbuf);
+                       tx++;
+                       continue;
+               }
+               work();
+               ev.queue_id++;
+               worker_fwd_event(&ev, RTE_SCHED_TYPE_ATOMIC);
+               worker_event_enqueue(dev, port, &ev);
+               fwd++;
+       }
+
+       if (!cdata.quiet)
+               printf("  worker %u thread done. RX=%zu FWD=%zu TX=%zu\n",
+                               rte_lcore_id(), received, fwd, tx);
+       return 0;
+}
+
+static int
+worker_do_tx_single_burst(void *arg)
+{
+       struct rte_event ev[BATCH_SIZE + 1];
+
+       struct worker_data *data = (struct worker_data *)arg;
+       const uint8_t dev = data->dev_id;
+       const uint8_t port = data->port_id;
+       size_t fwd = 0, received = 0, tx = 0;
+
+       while (!fdata->done) {
+               uint16_t i;
+               uint16_t nb_rx = rte_event_dequeue_burst(dev, port, ev,
+                               BATCH_SIZE, 0);
+
+               if (!nb_rx) {
+                       rte_pause();
+                       continue;
+               }
+               received += nb_rx;
+
+               for (i = 0; i < nb_rx; i++) {
+                       rte_prefetch0(ev[i + 1].mbuf);
+                       if (ev[i].sched_type == RTE_SCHED_TYPE_ATOMIC) {
+
+                               worker_tx_pkt(ev[i].mbuf);
+                               ev[i].op = RTE_EVENT_OP_RELEASE;
+                               tx++;
+
+                       } else {
+                               ev[i].queue_id++;
+                               worker_fwd_event(&ev[i], RTE_SCHED_TYPE_ATOMIC);
+                       }
+                       work();
+               }
+
+               worker_event_enqueue_burst(dev, port, ev, nb_rx);
+               fwd += nb_rx;
+       }
+
+       if (!cdata.quiet)
+               printf("  worker %u thread done. RX=%zu FWD=%zu TX=%zu\n",
+                               rte_lcore_id(), received, fwd, tx);
+       return 0;
+}
+
 /* Multi stage Pipeline Workers */
 
 static int
@@ -617,15 +701,33 @@ get_worker_loop_non_burst(uint8_t atq)
        return worker_do_tx;
 }
 
-void
-set_worker_tx_setup_data(struct setup_data *caps, bool burst)
+static worker_loop
+get_worker_single_stage(bool burst)
+{
+       if (burst)
+               return worker_do_tx_single_burst;
+
+       return worker_do_tx_single;
+}
+
+static worker_loop
+get_worker_multi_stage(bool burst)
 {
        uint8_t atq = cdata.all_type_queues ? 1 : 0;
 
        if (burst)
-               caps->worker = get_worker_loop_burst(atq);
+               return get_worker_loop_burst(atq);
+
+       return get_worker_loop_non_burst(atq);
+}
+
+void
+set_worker_tx_setup_data(struct setup_data *caps, bool burst)
+{
+       if (cdata.num_stages == 1)
+               caps->worker = get_worker_single_stage(burst);
        else
-               caps->worker = get_worker_loop_non_burst(atq);
+               caps->worker = get_worker_multi_stage(burst);
 
        memset(fdata->tx_core, 0, sizeof(unsigned int) * MAX_NUM_CORE);
 
@@ -634,4 +736,5 @@ set_worker_tx_setup_data(struct setup_data *caps, bool burst)
        caps->scheduler = schedule_devices;
        caps->evdev_setup = setup_eventdev_worker_tx;
        caps->adptr_setup = init_rx_adapter;
+
 }